Parallel NOR flash power supply design

[tramu]

Dear Sir,

I want to calculate the power requirement of an NOR flash from micron.

IC requires two power supplies: VCC(core) & VCCQ(I/O).

I calculated the power requirement of VCC(core) from the data sheet as VCC(max) * ICCW.

I want to calculate the power requirement of the VCCQ(I/O) supply.

I am not able to get the data from the vendor.

How, do I calculate the VCCQ(IO) supply power requirement of a NOR flash.

Please find the attached datasheet for reference.

Thanks in advance.

Regards,
Thulasi

 

[aruipksni]

Dear Sir,

I want to calculate the power requirement of an NOR flash from micron.

IC requires two power supplies: VCC(core) & VCCQ(I/O).

I calculated the power requirement of VCC(core) from the data sheet as VCC(max) * ICCW.

I want to calculate the power requirement of the VCCQ(I/O) supply.

I am not able to get the data from the vendor.

How, do I calculate the VCCQ(IO) supply power requirement of a NOR flash.

Please find the attached datasheet for reference.

Thanks in advance.

Regards,
Thulasi

well, this is not really the forum for that , but don't you need to calculate the io current by the rising/fallling time and the output load ?

 

[tramu]

well, this is not really the forum for that , but don't you need to calculate the io current by the rising/fallling time and the output load ?

Hi aruipksni,

How do i calculate io current by rising/falling time and the output load ?

Please help in this direction. Please share any document/link to read...

Regards,
Thulasi

 

[aruipksni]

Hi aruipksni,

How do i calculate io current by rising/falling time and the output load ?

Please help in this direction. Please share any document/link to read...

Regards,
Thulasi

1/ from datasheet get rise , fall time - see which is the fastest (lower value).
2/ get you maximum output capacity of the flash , add it to all the connected devices input capacity - so you have the total load.
3/ from schematc check what is your max i/o voltage.
4/ use the simple formula i =~u*c/min(tr,tf), and multiply by number of dq pins + other ctrl pins.
so for example : for 2.5v power supply , 10pf, capacity, 5 ns tr you get 5ma/pin.